What’s Vulnerable › Vulnerabilities

CVE-2025-30373: Graylog Authenticated HTTP inputs do ingest message even if Authorization header is missing or has wrong value

• Severity: medium (CVSS 5.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2025-04-07 · updated 2026-06-17
• Weakness: CWE-285

Description

Graylog is a free and open log management platform. Starting with 6.1, HTTP Inputs can be configured to check if a specified header is present and has a specified value to authenticate HTTP-based ingestion. Unfortunately, even though in cases of a missing header or a wrong value the correct HTTP response (401) is returned, the message will be ingested nonetheless. To mitigate the vulnerability, disable http-based inputs and allow only authenticated pull-based inputs. This vulnerability is fixed in 6.1.9.

Affected products

• graylog2-server: from 6.1.0 before 6.1.9 — fixed in 6.1.9

How to fix

Upgrade to a fixed version: graylog2-server 6.1.9. Check the vendor advisory for mitigations.

References

• https://github.com/Graylog2/graylog2-server/commit/31bc13d3cd6f550ec83473d0f8666cd3ebf50f10
• https://github.com/Graylog2/graylog2-server/security/advisories/GHSA-q7g5-jq6p-6wvx

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